NO. 2264. BEES IN THE NATIONAL MUSEUM. 3—COCKERELL. 219 



teriorly well separated ; wings strongly smoky ; abdomen shining, dis- 

 tinctly punctured; ventral scopa black at sides, base, and on last 

 segment, otherwise shining white. 



Santa Eulalia, Peru, Jan. 18, 1913 (C. H. T. Townsend). 



Type.— Cat. No. 21689, U.S.N.M. 



Superficially like M. huasca'ri Cockerell, but easily separated by 

 the quite different ventral scopa, the dull mesothaorax, etc. Vachal 

 described a series of black Megachile of this general type ; these may 

 be distinguished from each other and from M. eulaliae, as follows: 



Ventral scopa pale or red at end 1 



Ventral scopa at least black on last segment 2 



1. Larger, 13-14 mm. long (Bolivia and Ecuador) aeqtdlibra Vachal. 



Smaller, 9.5 mm. long, ventral scopa entirely red (Chile). 



flammiventris Vachal. 



2. Larger, 14 mm. long; wings hyaline, washed with yellow basally (Bolivia). 



atricoma Vachal. 

 Smaller, not over 12 mm 3 



3. Wings hyaline, not grayish or smol^y ; border of clypeus sinuate (Bolivia). 



latula Vachal. 

 Wings grayish or bronzy or dark 4 



4. Mesothorax and scutellum smooth and polished ; ventral scopa pale in 



middle (Peru and Bolivia) tergina Vachal. 



Mesothorax and scutellum well punctured or not polished 5 



5. Ventral scopa black ; punctures of mesothorax and scutellum very large 



and dense (Mendoza) orcina Vachal. 



Ventral scopa partly pale 6 



6. Scopa orange in middle; wings grayish hyaline (Mendoza) nigella Vachal. 



Scopa white in middle; wings strongly smoky (Peru) culaliae Cockerell. 



MEGACHILE PERENENSIS, new species. 



Length about 11 mm.; anterior wing, 9.5; very robust; black; the 

 tarsi reddish apically; general effect of the abundant pubescence 

 dark reddish; vertex and front with very long hair, partly black 

 and partly ferruginous, the latter especially around the ocelli ; cheeks 

 with pale reddish hair, partly dark below; face with mainly black 

 hair, but pale at each side next to clypeus ; thorax above with mixed 

 ferruginous and dark-brown hair, at sides with ferruginous, shading 

 into white beneath; legs with short black or dark fuscous hair, but 

 a good deal of white on femora and trochanters, and dark red on 

 inner side of tarsi ; abdomen dorsally thickly covered with dark red 

 hair, the hind margins of segments with indistinct paler bands, last 

 segment with some appressed black hair; ventral scopa white at base, 

 red in middle, and reddish-black on last three segments; in addition, 

 ventral segments 2 to 5 have marginal bands of white hair, broadly 

 interrupted in middle. Mandibles broad, quadridentate, with red 

 hair at apex; clypeus convex, dull at sides, in middle polished, with 

 scattered large punctures, the lower margin broadly and shallowly 

 emarginate, with a small median tubercle; supraclypeal area in 



